JPS642399Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The present invention relates to a flexible distributed EL lamp used as a light source for illumination, a display element, an auxiliary light source as a backlight for liquid crystal display devices, etc.

(Conventional structure and its problems) Conventionally, as shown in Figure 1, the electrode terminal of a flexible distributed EL lamp is a metal terminal with a metal plate or wire processed into the transparent electrode and the back electrode. Conductive adhesives 1a and 1b were applied partially with a dispenser or a brush to ensure conductivity, and then an organic film adhesive tape 2 was used to temporarily fix the adhesive, and then a transparent electrode and a light emitter were applied. The back electrode and the envelope are laminated together and integrally molded using a roll laminator or heat press. However, this method has many unreasonable points, such as the effort required to apply a conductive adhesive such as silver paste and the time required for drying and curing.

Furthermore, in such a method, the thickness of the electrode lead-out portion becomes relatively large, and the phenomenon of air bubbles (commonly referred to as triangular voids) is likely to occur during lamination, which causes accelerated deterioration of characteristics.

When triangular voids occur in the electrode terminal stack, moisture from the outside air enters the envelope through the triangular voids and reacts with ZnS, the main component of the phosphor material, under an electric field, causing free precipitation of Zn and deterioration of brightness. There were drawbacks to promoting this.

(Purpose of the invention) The purpose of the invention is to simplify the application and temporary fixing work of conductive adhesive by using a metal foil tape that is both adhesive and penetrating conductive as an electrode terminal. The purpose is to eliminate the occurrence of triangular voids in the terminal stack and prevent brightness deterioration.

(Structure of the device) The present device is a flexible dispersion type EL lamp in which an insulating layer, a light emitting layer and a transparent electrode are sequentially laminated on a back electrode, and these are wrapped in an envelope. A portion of the foil protrudes through the adhesive and is adhered to each electrode or its lead-out portion so as to be electrically conductive, thereby forming an electrode lead-out portion.

(Description of Embodiment) An embodiment of the present invention will be described based on FIGS. 2 to 5.

FIG. 2 shows the structure of the electrode terminal used in the present invention, in which adhesive 4 is applied to one side of metal foil 3.
This is applied to each electrode and its lead-out part via an adhesive, and then a part of the metal foil 3 protrudes through the adhesive 4 by embossing, as shown at 12, to form an electrode. Or it is adhesively attached to the drawer part so as to be electrically conductive.

Figures 3 to 5 show a flexible distributed EL lamp according to the present invention, and 5 is an aluminum foil back electrode, on which barium titanate, lead titanate, and titanium oxide are placed in a high dielectric constant resin binder. The insulating layer 6 is coated with a high dielectric constant powder such as ZnS:Cu, Al-based, ZnS:Cu, Mn-based, ZnS:
Luminescent layer 7 in which fluorescent powder such as Cu and Br is dispersed
is coated with. Reference numeral 9 denotes a transparent electrode in which a thin film of indium tin oxide is formed on a transparent polyester film, and a collector electrode 8 is pattern-coated on the surface of this conductive film.

Embossed electrode extraction terminal 10 on back electrode 5
a. Embossed electrode extraction terminal 10 on collector electrode 8
The package to which b is pasted is sandwiched between envelopes 11 made of moisture-proof film, and the package is hermetically sealed by heat-pressing with a roll laminator or hot press.

(Effects of the invention) By using the electrode extraction terminal of the present invention, it is possible to eliminate the temporary fixing work using conductive adhesives and organic film adhesive tapes, and the electrode extraction part can be finished thinner, making it possible to heat-press the outer package. In some cases, the boundary between the package and the terminal is sufficiently sealed, the occurrence of triangular voids can be prevented, and the life characteristics are also improved.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of the main part of a conventional electrode extraction device, Fig. 2 is a sectional view of an embossed adhesive-coated metal foil, and Fig. 3 is an external view of an embodiment of the present invention from the transparent electrode side. FIG. 4 is a sectional view taken along the line A-A' in FIG. 3, and FIG. 5 is an external view from the back electrode side. 1a, 1b... Conductive adhesive, 2... Organic film adhesive tape, 3... Metal foil, 4... Adhesive,
5... Back electrode, 6... Insulating layer, 7... Light emitting layer,
8...Collecting electrode, 9...Transparent electrode, 10a, 10b
... Embossed electrode extraction terminal, 11 ... Envelope, 12 ... Emboss.

Claims (1)

[Scope of utility model registration request] In a flexible distributed EL lamp in which an insulating layer, a light-emitting layer, and a transparent electrode are sequentially laminated on a back electrode and these are wrapped in a package, a metal foil coated with an adhesive on one side partially coats the adhesive. A flexible distributed EL lamp, which protrudes through the lamp and is bonded to each of the electrodes or their lead-out portions in an electrically conductive manner to form an electrode lead-out portion.